Grape bagging needs to be carried out after the flowers of the plants wither for one month. Before bagging, the flower heads of grapes need to be cut off, and then waterproof paper bags should be put on the grapes. At the same time, in the later maintenance process of grapes, plants can be watered with mineral-rich river water and balanced nutrients, so that grapes can bear more fruits.

Matters needing attention

First, the choice of paper bags, grape paper bags should be selected according to different varieties and different climatic conditions. Pay attention to the selection of grape paper bags produced by regular manufacturers, which require good air permeability, good light transmittance, strong weather resistance and softness, so that bagged grapes can grow without disease.

Second, bagging method: when bagging, first soak the paper bag mouth about 5 cm in water, so it is easy to tie the bag tightly and softly; Then expand the paper bag to make it swell, put the whole ear into the bag from bottom to top, shrink the paper bag mouth from both sides together, so that the paper bag mouth is concentrated on the ear stalk to ensure that the bag is close to the new grape shoot, and finally tie the bag mouth tightly with the sealing line on one side, but pay attention to leaving the paper bag on the sealing line to prevent pests and diseases after bagging, or unpack and spray medicine. If the medicine is sprayed before bagging, it should be bagged after the medicine and water are dried.

Third, the management after bagging: mainly control the pests and diseases of grape leaves and new shoots. Fourth, the time of bagging grapes: after bagging grapes, you can pick them directly without bagging; If bagging is required, unpack the bags 10- 15 days before grape picking. Generally, red, purple and black varieties can be bagged about 10 days before picking to make the grapes have good color.